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  • Sobre la teoría de la relatividad especial y general - Albert Einstein August 17, 2017
    Entre el Electromagnetismo y la Mecánica newtoniana existe una fórmula de bisagra: la teoría de la relatividad especial y general. La importancia del nuevo marco planteado por Albert Einstein se entiende por lo siguiente: la percepción del tiempo y el espacio es relativa al observador. ¿Qué significa esto? Si usted viaja a una velocidad mayor que la de la lu […]
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  • Una mochila para el universo - Elsa Punset August 17, 2017
    ¿Cuánto debe durar un abrazo? ¿De qué sirve llorar? ¿Qué podemos hacer para cambiar nuestra suerte? ¿Tiene algún propósito el enamoramiento? ¿Y por qué es tan inevitable el desamor? ¿Cómo aprendemosa tener miedo? ¿A partir de qué edad empezamos a mentir? ¿Por qué sentimos envidia? ¿Cuántos amigos necesitamos para ser felices? ¿Podemos evitar estresarnos sin […]
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  • Física General Esencial - Agustín Vázquez Sánchez August 17, 2017
    La nueva edición del ebook contiene ahora ocho temas completos de física y una sección de prácticas para realizar en casa. Se han corregido errores y agregado más ejemplos y ejercicios además de recursos multimedia en todos los capítulos.  Los ejemplos resueltos se presentan paso a paso a través de una solución algebraica con lo cual se evitan errores n […]
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  • El cisne negro. Nueva edición ampliada y revisada - Nassim Nicholas Taleb August 17, 2017
    ¿Qué es un cisne negro? Para empezar, es un suceso improbable, sus consecuencias son importantes y todas las explicaciones que se puedan ofrecer a posteriori no tienen en cuenta el azar y sólo buscan encajar lo imprevisible en un modelo perfecto. El éxito de Google y You Tube, y hasta ell 11-S, son “cisnes negros”. Para Nassim Nicholas Taleb, los cisnes negr […]
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  • La teoría del todo - Stephen W. Hawking August 17, 2017
    Una manera clara y amena de acercarse a los misterios del universo. En esta esclarecedora obra, el gran físico británico Stephen Hawking nos ofrece una historia del universo, del big bang a los agujeros negros. En siete pasos, Hawking logra explicar la historia del universo, desde las primeras teorías del mundo griego y de la época medieval hasta las más com […]
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  • Ágilmente - Estanislao Bachrach August 17, 2017
    Bachrach es Doctor en biología molecular y explica el funcionamiento del cerebro. A través de ello, da consejos y herramientas para ser más creativos y felices en el trabajo y en la vida. La neurociencia es clara: el cerebro aprende hasta el último día de vida. La creatividad puede expandirse. Tu mente, mediante la aplicación de las técnicas correctas, puede […]
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  • El gran diseño - Stephen Hawking & Leonard Mlodinow August 17, 2017
    Aun antes de aparecer, este libro ha venido precedido, en todos los medios de comunicación, de una extraordinaria polémica sobre  sus conclusiones: que tanto nuestro universo como los otros muchos universos posibles surgieron de la nada, porque su creación no requiere de la intervención de ningún Dios o ser sobrenatural, sino que todos los universos pro […]
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  • Breve historia de mi vida - Stephen Hawking August 17, 2017
    La mente maravillosa de Stephen Hawking ha deslumbrado al mundo entero revelando los misterios del universo. Ahora, por primera vez, el cosmólogo más brillante de nuestra era explora, con una mirada reveladora, su propia vida y evolución intelectual. Breve historia de mi vida cuenta el sorprendente viaje de Stephen Hawking desde su niñez […]
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  • La física del futuro - Michio Kaku August 17, 2017
    Un recorrido asombroso a través de los próximos cien años de revolución científica. El futuro ya se está inventando en los laboratorios de los científicos más punteros de todo el mundo. Con toda probabilidad, en 2100 controlaremos los ordenadores a través de diminutos sensores cerebrales y podremos mover objetos con el poder de nuestras mentes, la inteligenc […]
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  • Tricks Any Dog Can Do! - Susan Day August 17, 2017
    This great book comes with advice and guidance as to the best way to teach these tricks. It offers more than one method which the reader can choose depending upon their own situation. There is also advice to using treats and shows you how to not end up with a treat junkie! This books is from the desk of Susan Day, a canine behaviourist. Susan teaches obedien […]
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New York Today: New York Today: Polluting the Perseids

Weather.init(); }()); It’s not only light pollution that could ruin your Perseid party — the weather will also be a drag. Today starts off sunny and warm (highs are in the low 80s), but there’s a chance of rain this evening. And during the day on Saturday. Start wishing upon the stars that Saturday night’s forecast holds: It’s currently partly cloudy and dry. So is Sunday, with a high near 83. In the News • Gov. Andrew M. Cuomo said there must be a fix for the subway system’s power-related issues, which were responsible for 32,000 delays over the past year. [New York Times] Photo Monitoring the lines between 59th and 125th Streets at the Columbus Circle station […]

Ruff Cycles’ retro Ruffian e-bike is not just for ‘real men’

It is quite a sweet ride, but I’d venture to say that any ‘real human’ would enjoy cruising around on the Ruffian. […]

Government Report Finds Drastic Impact of Climate Change on U.S.

The report concludes that even if humans immediately stopped emitting greenhouse gases into the atmosphere, the world would still feel at least an additional 0.50 degrees Fahrenheit (0.30 degrees Celsius) of warming over this century compared with today. A small difference in global temperatures can make a big difference in the climate: The difference between a rise in global temperatures of 1.5 degrees Celsius and one of 2 degrees Celsius, for example, could mean longer heat waves, more intense rainstorms and the faster disintegration of coral reefs.OPEN GraphicGraphic: How Americans Think About Climate Change, in Six MapsAmong the more significant of the study’s findings is that it is possible to attribute some extreme weather to climate change. The field known as “attribution science” has advanced rapidly in response to increasing risks from climate change.The report finds it “extremely likely” that more than half of the global mean temperature increase since 1951 can be linked to human influence.In the United States, the report finds with “very high” confidence that the number and severity of cool nights has decreased, while the frequency and severity of warm days has increased since the 1960s. Extreme cold waves, it says, are less common since the 1980s, while extreme heat waves are more common.Newsletter Sign UpContinue reading the main storyInterested in Climate Change?Sign up to receive our in-depth journalism about climate change around the world.Thank you for subscribing.An error has occurred. Please try again later.You are already subscribed to this email.View all New York Times newsletters.The study examines every corner of the United States and finds that all of it was touched by climate change. It said the average annual rainfall across the country has increased by about 4 percent since the beginning of the 20th century. Parts of the West, Southwest and Southeast are drying up, while the Southern Plains and Midwest are getting wetter.With a medium degree of confidence, the authors linked the contribution of human-caused warming to rising temperatures over the Western and Northern United States. It found no direct link in the Southeast.The Environmental Protection Agency is one of 13 agencies that must approve the report by Sunday. The agency’s administrator, Scott Pruitt, has said he does not believe that carbon dioxide is a primary contributor to global warming.OPEN GraphicGraphic: 95-Degree Days: How Extreme Heat Could Spread Across the World“It’s a fraught situation,” said Michael Oppenheimer, a professor of geoscience and international affairs at Princeton University who was not involved in the study […]

U.S. Troops Train in Eastern Europe to Echoes of the Cold War

With that in mind, top American planners and intelligence officials are closely watching Russian operations in Crimea, eastern Ukraine, and Syria, all proving grounds for new Russian tactics and weaponry. Young American Army officers are once again using flash cards — or the digital equivalent — to study the structure and abilities of Russian Army units, just as American officers did with earlier generations of Russian forces and weaponry in the 1970s and 1980s.Continue reading the main storyThe Army’s training centers in California, Louisiana and Germany are now including more scenarios that replicate Russian forces, even if scenario planners there, and here, are careful to give the opposing forces fictitious names to avoid ruffling diplomatic feathers even more between Washington and Moscow.The United States Army’s presence in Europe is a far cry from the height of the Cold War, 30,000 soldiers now compared with 300,000 then, General Hodges said. For that reason, the general is putting heavy emphasis on the “speed of assembly” — how quickly troops and their equipment can move hundreds of miles and be prepared to fight at a moment’s notice.The $40 million exercise here, called Saber Guardian, the largest in Europe this year, included driving more than 1,000 troops and hundreds of vehicles about 1,200 miles across Europe, the equivalent of going from St. Louis to Miami. Hundreds of allied troops — including American soldiers with faces painted in green and black camouflage — and their 60-ton tanks crossed the Danube River on temporary bridges, fending off mock attacks on the other side.Continue reading the main story […]

Trump Rules: Under Trump, Coal Mining Gets New Life on U.S. Lands

President Trump, along with roundly questioning climate change, has moved quickly to wipe out those measures with the support of coal companies and other commercial interests. Separately, Mr […]

Rob Greenfield: How we can be the change we want to see in a "messed up" world

When it comes to walking the green and sustainable walk, Greenfield really puts it all on the line. […]

Kushner Companies Said to Be Under Investigation Over Visa Program

In a statement, Kushner Companies’ general counsel, Emily Wolf, said the company was cooperating with the authorities.“EB-5 is a longstanding federal program that is frequently used by many large developers to raise funds and help create jobs,” Ms. Wolf said. […]